1): ¬( p ∨ q ) ≡ ¬p ∧ ¬q The above law is called Group of answer choices De Morgans Law Absorption Law Complement Law Double Negation Law
1): ¬( p ∨ q ) ≡ ¬p ∧ ¬q The above law is called Group of answer choices De Morgans Law Absorption Law Complement Law Double Negation Law
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
Related questions
Question
1): ¬( p ∨ q ) ≡ ¬p ∧ ¬q
The above law is called
Group of answer choices
De Morgans Law
Absorption Law
Complement Law
Double Negation Law
2):
To prove the this identity
¬p → (q → r) ≡ q → (p ∨ r)
The following reasoning is valid:
¬p → (q → r)¬¬p ∨ (q → r) Conditional identity
p ∨ (q → r) Double negation law
p ∨ (¬q ∨ r) Conditional identity
(p ∨ ¬q) ∨ r Associative law
(¬q ∨p) ∨ r Commutative law
¬q ∨ (p ∨ r) Associative law
q → (p ∨ r) Conditional identity
Group of answer choices
True
False
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